Merge pull request #403 from StevenRasmussen/is-non-visible-item

Adds the 'IsNonVisibleItem' property to the 'SolutionItem' class.

Author: madskristensen

src/toolkit/Community.VisualStudio.Toolkit.Shared/ExtensionMethods/IVsHierarchyExtensions.cs

@@ -132,5 +132,37 @@ public static bool IsSharedProject(this IVsHierarchy hierarchy)
 
             return hierarchy.GetSharedAssetsProject() != null;
         }
+
+        /// <summary>
+        /// Returns the <see cref="IVsHierarchy"/> for the <see cref="IVsHierarchyItemIdentity"/>
+        /// </summary>
+        /// <param name="item"></param>
+        /// <returns></returns>
+        public static IVsHierarchy GetHierarchy(this IVsHierarchyItemIdentity item) =>
+            item.IsNestedItem ? item.NestedHierarchy : item.Hierarchy;
+
+        /// <summary>
+        /// Returns the 'ItemId' for the <see cref="IVsHierarchyItemIdentity"/>
+        /// </summary>
+        /// <param name="item"></param>
+        /// <returns></returns>
+        public static uint GetItemId(this IVsHierarchyItemIdentity item) =>
+            item.IsNestedItem ? item.NestedItemID : item.ItemID;
+
+        /// <summary>
+        /// Returns the <see cref="IVsHierarchy"/> for the <see cref="IVsHierarchyItem"/>
+        /// </summary>
+        /// <param name="item"></param>
+        /// <returns></returns>
+        public static IVsHierarchy GetHierarchy(this IVsHierarchyItem item) =>
+            item.HierarchyIdentity.GetHierarchy();
+
+        /// <summary>
+        /// Returns the 'ItemId' for the <see cref="IVsHierarchyItem"/>
+        /// </summary>
+        /// <param name="item"></param>
+        /// <returns></returns>
+        public static uint GetItemId(this IVsHierarchyItem item) =>
+            item.HierarchyIdentity.GetItemId();
     }
 }

src/toolkit/Community.VisualStudio.Toolkit.Shared/Solution/SolutionItem.cs

@@ -3,7 +3,6 @@
 using System.Diagnostics;
 using System.Linq;
 using System.Threading.Tasks;
-using System.Windows.Automation.Peers;
 using Microsoft.Internal.VisualStudio.PlatformUI;
 using Microsoft.VisualStudio;
 using Microsoft.VisualStudio.Shell;
@@ -23,6 +22,7 @@ public class SolutionItem
         private IVsHierarchy _hierarchy = default!; // Initialized to non-null via the `Update()` method.
         private string? _fullPath;
         private uint _itemId;
+        private Lazy<bool> _isNonVisibleItem = default!; // Initialized to non-null via the `Update()` method.
 
         /// <summary>
         /// Creates a new instance of the solution item.
@@ -38,9 +38,13 @@ internal void Update(IVsHierarchyItem item)
         {
             ThreadHelper.ThrowIfNotOnUIThread();
             _item = item;
-            _hierarchy = item.HierarchyIdentity.IsNestedItem ? item.HierarchyIdentity.NestedHierarchy : item.HierarchyIdentity.Hierarchy;
-            _itemId = item.HierarchyIdentity.IsNestedItem ? item.HierarchyIdentity.NestedItemID : item.HierarchyIdentity.ItemID;
+            _hierarchy = item.GetHierarchy();
+            _itemId = item.GetItemId();
             _fullPath = GetFullPath();
+            _isNonVisibleItem = new Lazy<bool>(() =>
+            {
+                return HierarchyUtilities.TryGetHierarchyProperty(_hierarchy, _itemId, (int)__VSHPROPID.VSHPROPID_IsNonMemberItem, out bool isNonMemberItem) && isNonMemberItem;
+            });
         }
 
         /// <summary>
@@ -73,6 +77,11 @@ internal void Update(IVsHierarchyItem item)
         /// </summary>
         public IEnumerable<SolutionItem?> Children => _children ??= _item.Children.Select(t => FromHierarchyItem(t));
 
+        /// <summary>
+        /// Returns whether the item is normally hidden in solution explorer and only visible when Show All Files is enabled.
+        /// </summary>
+        public bool IsNonVisibleItem => _isNonVisibleItem.Value;
+
         /// <summary>
         /// Gets information from the underlying data types.
         /// </summary>
@@ -128,7 +137,7 @@ public void GetItemInfo(out IVsHierarchy hierarchy, out uint itemId, out IVsHier
             {
                 throw new ArgumentNullException(nameof(hierarchy));
             }
-            
+
             ThreadHelper.ThrowIfNotOnUIThread();
             IVsHierarchyItem item = hierarchy.ToHierarchyItem(itemId);